How many possible permutations are in letters a, b, c, d, e, f

Use the x-intercept method to find all real solutions of the equation.x^3-10x^2+27x-18=0

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?